US Bridges

Mensching RD over Kishwaukee River

Fair

McHenry County, Illinois · 6.0 S of Woodstock · Structure no. 056314500000000

Built
1985
40 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
57 ft
1 main span
Daily traffic
125
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mensching RD over Kishwaukee River is a prestressed concrete box beam or girders - multiple carrying Mensching RD over Kishwaukee River in McHenry County, Illinois. It was built in 1985, so it is 40 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 125 vehicles a day, roughly 10% of them trucks, projected to reach 150 by 2046. The structure is 57 ft (17.4 m) long and 27 ft wide.

Location

Open in Google Maps
CarriesMensching RD
CrossesKishwaukee River
Location6.0 S of Woodstock
RouteCounty Highway 0
CountyMcHenry County
StateIllinois
Coordinates42.22727, -88.45652
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating20.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span55 ft (16.8 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2021)
Projected traffic150 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mensching RD over Kishwaukee River built?

It was built in 1985, making it 40 years old in 2025.

What condition is Mensching RD over Kishwaukee River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does Mensching RD over Kishwaukee River carry?

About 125 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Mensching RD over Kishwaukee River?

The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 27 ft wide.

Who owns Mensching RD over Kishwaukee River?

It is owned by the Town or Township Highway Agency.